In 2021-2022 specialists of our company have studied and introduced into construction process a new construction material, RAU. This material was developed on the basis of technical norms for Swiss asphalt-concrete mixes, which include ACMR (8, 11), or "rau" (German for "rough"). This type of asphalt features a rough surface due to grain size and high porosity (3-6%) of the material. The first batch of RAU-8 was produced and applied on the loaded part of "Airport" production base of Suburban branch. At the same time, for reconstruction of production base of Sabinsky branch we applied RAU-8 which included polymer-modified binder (PMB) based on non-oxidized bitumen, a non-oxidized by atmospheric oxygen residuum of oil processing plant.

According to the tests the material is highly resistant against rutting caused by heavy transport. Specialists of our central laboratory have developed СТО 0602-85132080-2022 "Asphalt-concrete mixes and stone mastics with highly rough surfaces Rough Asphalt Universal" organization standard, in which Swiss norms were harmonized with Russian, and now the material is ready to be used for road construction in the Republic of Tatarstan.

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